Safety, sport or recreational eyewear with interchangeable optical prescription pvc foil insert

ABSTRACT

Polycarbonate Frame ( 1 ) manufactured to house an Interchangeable PVC Prescription Optical Foil ( 2 ) manufactured to conform to the polycarbonate frame dimensions is provided. The polycarbonate frame ( 1 ) includes a central nose bridge portion ( 3 ), moulded lenses ( 4 ), nose pads ( 5 ), first and second wrap around frame arms ( 6   a  and  6   b ) first and second frame arm hinge gussets (7 a  and  7   b ) designed to strengthen the frame hinge and locate the PVC Prescription Optical Foil In its correct optical position, broad outer temples ( 8   a  and  8   b ), deep inner hinges ( 9   a  and  9   b ) to securely attach and lock the PVC Prescription Optical Foil into Its correct location within the frame. The Prescription Optical Foil ( 2 ) provides two Inner foil radiuses ( 10   a  and  10   b ) for the fitting of prescription corrective lenses, nose bridge ( 11 ) is compatible with the nose bridge Of the Polycarbonate Frame ( 1 ), nose pad hooks ( 12   a  and  12   b ) are supplied to ensure correct central alignment end location of the PVC Prescription Optical Foil. Foil Gusset Slots ( 13   a  and  13   b ) are provided to ensure the correct alignment of the PVC Prescription Optical Foil at the top and base of the frame arm hinge gussets ( 7   a  and  7   b ), Foil Locking Prongs ( 14   a  and  14   b ) are slotted into the front crevice  ( 15   a  and  15   b ) of the deep inner hinges ( 9   a  and  9   b ) to lock and secure the PVC Prescription Optical Foil into its proper place.

There have been previous attempts to insert optical prescription lenses onto or into safety, sport or recreational eyewear such as interchangeable screw in type single lenses which are expensive to replace when damaged or scratched and not easily removed and replaced, and, prescription optical safety lenses attached directly into the optical frame or onto the outer or inner protective lens resulting in flat style protective frames fitted with protective side shields. The principle disadvantages of these previous constrictions are that once the optical lenses become scratched or damaged there is considerable expense and replacement times meaning that the wearer's safety and those working around him/her on the job is jeopardized while waiting for replacement optical safety glasses from their optician or supplier. These previous attempts result in the frame being further away from the wearers face allowing small gaps between the wearer's protective frame and the wearer's orbital area thus increasing the risk of flying particles breaching the frame integrity.

This invention relates to and comprises of safety or sport or recreational eyewear with an interchangeable optical PVC foil with pupil distances up to 60 mm, 64 mm and above 64 mm capable of being fitted with prescription optical lenses including single lens, bifocal lens or multifocal lens with a base curve not exceeding 4.75, optical correction up to +/−10 dpt and lens grooves 0.6 mm in width by 0.9 mm in depth for incorporation into a specifically designed safety or sport wrap around polycarbonate protective frame approved to Australian Standard 1337. The polycarbonate protective frame has no optical distortion which ensures and maintains correct refractive vision and excellent eye protection under all workplace, sporting or recreational activities.

The PVC prescription optical foil insert is securely fitted to the inside face of the protective polycarbonate safety frame by way of two locking prongs being positioned and locked into the front crevice of each hinge of the wrap around polycarbonate protective frame and follows the inside radius of the protective polycarbonate frame when fitted, ensuring maximum clearance between the back surface of the optical lenses and the outer surface of the wearer's pupils, this ensures the wearer has a complete wrap around protective shield and ensures optically stable vision at all times.

The Polycarbonate protective frame ensures the protection of the fitted prescription optical lenses from scratching or damage as the PVC optical foil is attached to the inside face of the polycarbonate frame. 

1. A pair of polycarbonate wrap around glasses and an interchangeable PVC prescription optical foil insert, in particular safety, sports and recreational glasses, comprising of polycarbonate moulded lenses free of any optical distortions with first and second wrap around arms, manufactured to accommodate an interchangeable PVC prescription optical foil insert secured to and conforming with the inner radius of the polycarbonate glasses when fitted.
 2. A pair of glasses and a PVC prescription optical foil insert according to claim 1, wherein first and second frame arm comprising of deep inner hinges, hinge gussets and deep hinge crevices are integrally injection moulded on the frame.
 3. A pair of glasses and a PVC prescription optical foil insert according to claim 1, wherein the PVC prescription optical foil insert comprising of foil locking prongs integrated into each end of the PVC prescription optical foil insert.
 4. A pair of glasses and a PVC prescription optical foil insert according to claim 1, wherein the PVC prescription optical foil insert comprising of foil gusset slots integrated into each end of the PVC prescription optical foil insert.
 5. A pair of glasses and a PVC prescription optical foil insert according to claim 1, wherein the PVC prescription optical foil insert comprising of nose pad hooks integrated with the nose bridge of the PVC prescription optical foil insert.
 6. A pair of glasses and a PVC prescription optical foil insert according to claim 1, wherein the PVC prescription optical foil insert comprising of two inner radiuses for the fitting of prescription corrective lenses into the PVC prescription optical foil insert. 